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A nearly $70 million signal system on Metro-North's Danbury Branch has malfunctioned repeatedly since its November completion, resulting in dangerous rail crossings and longer commutes.

Soon after the Danbury-Bethel section, the final section, of the signal system along the 24-mile line between Danbury and South Norwalk was completed, the gates and flashing lights that block roads when an oncoming train is approaching, began to trigger when no trains were in sight.